<form action="/paypal/checkout_action" method="POST">
    <div class="paypal_button">
        <div class="mb-2">{{@root.paymentConfig.paypal.description}}</div>
        <button id="checkout_paypal" class="btn btn-outline-success waves-effect waves-light blue darken-3" type="submit">Pay with PayPal</button>
    </div>
</form>